11.24: Two wave pulses travel to the *-vlvv4r;i,os o 1riw right toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best represents the superpositio- or4;1 lrs vi,vwvoi*n of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through th-d*1r7 *jvxo 2gvewzu e air and strikes the surface of a plastic block. Which pair of statements correctly desx e7zd*v gro1- *vu2wjcribes the phase changes for the reflected wave and the transmitted wave?

  12.02: A ray of light passes straig(rhkdb1m h:r h)4d:aoht downward through the point labeled B in the diaghd::h (r d1h4krmabo )ram shown. The ray reaches a flat mirror placed at an angle $\Theta$ to the horizontal as shown. Which one of the locations labeled in the figure best represents the point through which the ray reflected from the mirror will pass?

  00.04: Specular reflection occursu7b;0ew4 k)dl rrlka(9 kvbb1 whenever light is incident on

  05.18: A student hold a hand mirror to observe the back of her head whileul -. em++nr:k,xzjb 9uabp6j standing in front of and looking into a wall mirror. If she is standing 4 ft in front of thmne a: uz+ klu6xb9rp-jj+., be wall mirror and she holds the hand mirror 1 ft behind her head, she will see the back of her head how far behind the wall mirror?

  14.25: It is observed that a light ran q7 69bfm l+bw.0fsypy changes direction when it enters a new material. Which one 9w0q.7+bp ysbmfnl f6 of the following choices is the term best associated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelength 400 nm in b (xco 5 2iys9kytclq-n, *:pma transparent material. Whayy bc9(it2: cos-x,5p* mqnlkt is the index of refraction of the material?

  98.04: As sound travels from s2c5kw(a nhrd pn9y-2mteel into air, both its speed and its:

  00.01: As a wave moves from one medium to a second medium wizrw3i;om t z01th a different index of refraction which of t 3ti1w0 ;orzzmhe following wave properties would NEVER change?

  05.47: A sound wave generated from a tunk lo; pl3m()aaing fork of single frequency travels from air (with spee;p 3k)l(aoml ad of sound 340 m/s) into rock (with speed of sound 1500 m/s). Which statement is true about the wavelength and frequency of the sound as it passes from air to rock?

  14.28: A waterproof speaker placed at the bottom of a swimming pool emits d ew1c:x0 m0ibpni8t8 a sound wave that travels toward the surface of the wa81x bn0ip di8:wcemt 0ter. In the water, the sound wave has a frequency $f_{water}$, wavelength $\lambda_{water}$ , and wave speed $v_{water}$ . When the sound wave enters the air it has a frequency $f_{air}$ ,wavelength $\lambda_{air}$, and wave speed $v_{air}$ . Which one of the following relationships correctly compares the frequencies, wavelengths, and wave speeds of the waves in the air and water?

  02.33: A short burst of white light strikes a rectangular t75 sjro*w4jc h+ctr(,chu5i glass block with an angle of incidence o5h rr+wj h,*tt75scuicc j(o4 f $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of light is directed n,.mhj0lvjb 3 emwve p97j+g+ toward a point P on a boundary as shown to the right. Which sevphj.lejm9v w7j++e0, g bmn3gment best represents the refracted ray?

  98.17: Which diagram best represents what happens (k3;nelt1tcnx3ia)q b/fc-zto a ray of light entering air from water? Air is atb ;kien q-l/ 3ctz( x)ta3cfn1 the top in all diagrams.

  94.11: The critical angle of a material is the angle of incidence for which thp*hxu9ac4-c6pgo r:9 itfe ; s*yqp9re angles 99cucxtfp4 rrpi;:e96o *hpy*- gaq of refraction is:

  95.12: The principle underlyin,xe a(q1)v 4qqhx/ft wg fiber optics is:

  98.36: The critical angle in a trws8 watrlb*0vs.l8j o 78rvl8ansparent substance surrounded by air is $30^{\circ}$. The speed of light in
the substance (in multiples of $10^8$ m/s) is most nearly

  01.28: Light travels fv v3:rs8 twwg2; :che fow/i9mrom material X with an index of refraction of n = 1.5 to material Y with an index of refraction of n = 2.0. If the speed of light in material Y is v, what is the speed of/2rhg;c:vstfw owi 9mev8w:3 light in material X?

  03.15: A jeweler can distinguish between a diamond and a p*ft e t1mfk9(34tsnp( j v6jgziece of glass by observing the critical angle of thejzf *fjm( 9v1k3 6stn4t(epgt light in each material. Glass with an index of refraction of 1.52 has a critical angle of $41.1^{\circ}$ while a diamond with an index of refraction of 2.42 would have a critical angle of:

  05.26: Light shines from air into 93hx )pd*(fzliw 0jyza clear material. When the light makes an angle of incj) 3(x 0wl f*yz9hpzididence equal to $30.0^{\circ}$, the light refracts at an angle of 1$5.0^{\circ}$. If the light is shone from an angle of incidence of $60.0^{\circ}$, what is the angle of refraction?

  95.40: A Metrologic laser i) d m78pvgnt.rs embedded in a material of index of refraction n. The laser beam emerges from the material and hits a target. See the accompanying figure for the position parameters of the laser and target. The value of n ig m.tp8v 7nrd)s:

  95.31: A beam of light passes from medium 1 to medium 2 to medium 3 as smf mah(wozp g(:94/cn hown in the accompanying figurez/chmaf(9 wm4(p: ong. What is true about the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium 3 ay *lolx rss f;jp 215: /9lnn1lznf0hes shown in the diagram. What may be concluded about the tso9 j;elfnnx1lz/s*n r5ly0h :lfp12hree indexes of refraction, n1, n2 and n3?

  97.24: The accompanying d+3jcun ;4 vcdriagram shows the path that a light ray takes passing through three transparent materials. The indices of refraction in materials 1, 2, and 3 are n1, n2, and n3, respectively. Which of the following best describes the relation between the indices of refractio+dr 34ccj nuv;n?

  09.34: The diagram below shows the path taken by a monochromatic light rayt.wh:j6y-d ) jjqfg) m traveling through three mediamfj:htd w)q).6-jgjy.The symbols $v_1$,$\lambda_1$ , and $f_1$ represent the speed, wavelength, and frequency of the light in Medium 1, respectively. Which of the following relationships for the light in the three media is true?

  99.26: A beam of light traveling in vzm7 qi0cd4h k-sc o991f dw8oglass ($n_g$=1.5) strikes a boundary with air ($n_a$ =1.0) at point P.The angle
of incidence is $60^{\circ}$ as shown in the diagram. Which ray would best indicate the beam’s path after point P?

  04.35: A ray of light is incide *iassr4yq,bdf9h8e-q* pbe*nt on the surface of a rectangular block of glass h8,s q *r*fsi-yed*e4 qbpa9bat an angle of $45^{\circ}$. It refracts into the glass and then strikes the side of the block as shown in the diagram. What would be the most likely path of the light after striking the side of the glass block?

  13.27: Light of wavelength 600nm is transmitted from air into a piece on ilew.p; (*otf glass. Which one of the labeled arrows best indicates the path of the light ray after* o(nleptw ;i. it enters the glass?

  14.44: A ray of monochromatic light enters the right-triangular glass as shwx acqn2 )jq n8tfjfz1fg8, 3/own. The glass has an index of refraction of 2.00 and it is surrounded by air. Which one of the lettered rays shows the path of the light after i axfn182wt8f)nz3 qjg,jq fc/ t exits the glass?